Submission #163345

#	Time	Username	Problem	Language	Result	Execution time	Memory
163345		MvC	Swap (BOI16_swap)	C++11	100 / 100	197 ms	16248 KiB

swap

#include<cstdio>
#include<iostream>
#include<cstdlib>
#include<cmath>
#include<vector>
#include<algorithm>
#include<set>
#include<map>
#include<queue>
#include<cstring>
 
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define FORD(i, a, b) for(int i = (a); i >= (b); --i)
#define VAR(v, i) __typeof(i) v=(i)
#define FORE(i, c) for(VAR(i, (c).begin()); i != (c).end(); ++i)
 
#define VI vector<int>
#define PII pair<int,int>
#define st first
#define nd second
#define mp make_pair
#define pb push_back
#define lint long long int
 
#define debug(x) {cerr <<#x <<" = " <<x <<endl; }
#define debug2(x,y) {cerr <<#x <<" = " <<x << ", "<<#y<<" = "<< y <<endl; }
#define debug3(x,y,z) {cerr <<#x <<" = " <<x << ", "<<#y<<" = "<< y << ", " << #z << " = " << z <<endl; }
#define debugv(x) {{cerr <<#x <<" = "; FORE(itt, (x)) cerr <<*itt <<", "; cerr <<endl; }}
#define debugt(t,n) {{cerr <<#t <<" = "; FOR(it,0,(n)) cerr <<t[it] <<", "; cerr <<endl; }}
 
#define make( x) int (x); scanf("%d",&(x));
#define make2( x, y) int (x), (y); scanf("%d%d",&(x),&(y));
#define make3(x, y, z) int (x), (y), (z); scanf("%d%d%d",&(x),&(y),&(z));
#define make4(x, y, z, t) int (x), (y), (z), (t); scanf("%d%d%d%d",&(x),&(y),&(z),&(t));
#define IOS ios_base::sync_with_stdio(0)
#define HEAP priority_queue
 
#define read( x) scanf("%d",&(x));
#define read2( x, y) scanf("%d%d",&(x),&(y));
#define read3(x, y, z) scanf("%d%d%d",&(x),&(y),&(z));
#define read4(x, y, z, t) scanf("%d%d%d%d",&(x),&(y),&(z),&(t));
 
using namespace std;
 
const int max_n = 2e5+5;
int t[max_n];
int n;
 
map<PII, PII> mem;
 
PII pos(int v, int num) {
	if (2*v > n) return mp(v,0);
	int a = t[2*v];
	int b = t[2*v+1];
	if (num < a && num < b) return mp(v,0);
	if (b > a && num > a) return mp(pos(2*v,num).st,-1);	
	if (mem.find(mp(v, num))!=mem.end()) return mem[mp(v,num)];
	if (num < a) {
		int p1 = pos(2*v, num).st;
		int p2 = pos(2*v+1, num).st;
		if (p1 < p2) {
			mem[mp(v, num)] = mp(p1,-2);
			return mp(p1,-2);
		}
		else {
			mem[mp(v, num)] = mp(p2,1);
			return mp(p2,1);
		}
	} else {
		int q1 = pos(2*v, a).st;
		int q2 = pos(2*v+1, a).st;
		if (q1 < q2) {
			int p2 = pos(2*v+1, num).st;
			mem[mp(v, num)] = mp(p2,1);
			return mp(p2, 1);
		} else {
			int p1 = pos(2*v, num).st;
			mem[mp(v, num)] = mp(p1,-2);
			return mp(p1,-2);
		}
	}	
}
 
int main() {
	read(n);
	FOR(i,0,n) {
		make(a);
		t[i+1] = a;
	}
	t[n+1] = 1e9;
	FOR(v,1,n/2 + 1) {
		PII xxx = pos(v, t[v]);
		if (xxx.nd == 1) swap(t[v], t[2*v+1]);
		if (xxx.nd == -1) swap(t[v], t[2*v]);
		if (xxx.nd == -2) {
			swap(t[v], t[2*v]);
			swap(t[v], t[2*v+1]);
		}
	}
	FOR(i,1,n+1) {
		printf("%d ", t[i]);
	}
	printf("\n");
	
}

Compilation message (stderr)

swap.cpp: In function 'int main()':
swap.cpp:38:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define read( x) scanf("%d",&(x));
                  ~~~~~^~~~~~~~~~~
swap.cpp:85:2: note: in expansion of macro 'read'
  read(n);
  ^~~~
swap.cpp:31:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define make( x) int (x); scanf("%d",&(x));
                           ~~~~~^~~~~~~~~~~
swap.cpp:87:3: note: in expansion of macro 'make'
   make(a);
   ^~~~

• Subtask 1: 10 / 10
• Subtask 2: 11 / 11
• Subtask 3: 27 / 27
• Subtask 4: 20 / 20
• Subtask 5: 32 / 32